gleason



(No Modl.)

E.'P.'GLEASON-. INSULATING JOINT.

No. 552,363. Patented Dec. 31,1895.

' Inventor.

' I Attorney.

' UNITED "STATES PATENT OF ICE.

ELLIOTT P. GLEASON, OF BROOKLY 'AssIGNoR TO THE E} -r. GLEASON MANUFACTURING COMPANY, OF NEW, YORK, N. Y. P

I :lNfS ii LATI NG-J-OINT.

SPECIFICATION forming part of Letters Patent No. 552,363, dated December 31, 1895. Application filed December 27, 1894. Serial No. 533,075. (No model.)

To all whom it may concern: l I

lie it known that I, ELLIOTT P. GLEASON, a

citizen of the United States, and a resident of lirooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Insulating-Joints, of

which the following is a specification.

This invention relates to insulating-joints for gas and electric fixtures. 1

I will describe a joint embodying my invention and then point out the novel features in the appended claims. q

In the accompanying drawings,Figure l is a longitudinal section of a joint embodying my invention. Fig. 2 is a plan View with certain parts'bniit'te'd and "indicating 'a ce'rtaiiipart in an upright position or before being turned down intoposition. Fig.3 is a'sectional view of a part employed, and Fig. 4 is a longitudinal section 'showinga modification. Referring by letter to the example shown in Fig. 1, the joint comprises two main portions A A. Each portion hasa tubular part,

' screw-threaded in its interior, for attachment to gas or other tubing, and an annular flange part a.

from the other by an annulus of insulating material a This insulating material, as well as all the other insulating material hereinafter mentioned, is preferably of mica.

B is a clamping device for securing the parts A A" together. This, clamping device, a sectional view of which is shown in Fig. 3,11as

a perforated bottom portion adapted to engage around the flange of one of the joint portions, and it has an annular side wall 6, adapted to be turned around the flangeof the other portion, as shown in full line in Fig. 1, the dotted lines in said figure indicating the said wall of the clamping device.

In the modification shown in Fig. 4 the I clamping device is formed integral with one of the joint portions and is turned upon the flange of the other portion, as shown at b.

In Fig. 1 a washer b of insulating material is interposed between the bottom of the I clampingdevice and the flange of the joint portion A, and a similar washer b is interposed between the wall b and the flange of the joint portion A. I

In Fig. 4 a washer b insulating material the other.

The portions A A are insulated one is interposed between the wall I) and the joint portion A, and in this example, as a means to prevent short circuiting, a metal rim B is turned over the outer edge of the fastening 55 device and mica washers b are interposed between theparts- A I provide means for preventing a rotary motion of the joint portions, one relatively to This means consists of plugs or dowels B of insulating material,extended through perforations in the flanges of the joint portions. employed for preventing this relative rotary movement-such, for instance, as undulating the faces oftheioint ngrtionsornrovid;

lders. F These methods are ob ectionable fog the reason that break the mica the uneven surfaces are apt t and'leave unprotected parts between the joint portions, and, further, as these joint portions are turnedin a lathe, the undulating or shouldering of the parts-involves extra labor and expense. .In my improvement the faces. of the flanges are at right angles to the tubular. portions, and therefore may beeasily turned true in'a lathe.

As a means to prevent'bridging between the interior adjacent surfaces of the joint portions by gas, tar, or similar sediment, Iplace small rings or washers b in depressions formed in theflangedends of -t e joint portions, as shown in Fig. 1.

- Having described my invention, what I claimis- 1. In an insulating coupling the combination of two tubular and'flanged portions, the faces of said flanged portions'being at substantiallyright angles to the length of the tubular port one, a fastening device,- consisting of a ring on the outside of the flanges and ooverin them and the plugs the insulating materia and plugs of insulating material extended through holes in the flanges, substantially as specified.

2. The combination of the joint portions A, A, the insulating material, substantially as shown anddescribed, and the plugs or dowels B, extended through holes in the flanges of the joint portions, none of said plugs extending beyond the sections to make electrical contactbetween either section and any object Means have heretofore been ICU with which said plug migilt or; counter, substantially as specified.

3. In an insulating coupling, two sections having perforated flanges secured together by a turned flange or ring and plugs of non-con- V ducting material extending into the holes in the sections, and insulating material disposed as set forth, as and for the purposes specified.

4. Inan insulating coupling, two sections having holes and flanges, in combination with plugs of insulating material locking the sections against turning and contacting non elec trically with both sections and a neutral ring covering the plugs and, holding the sections together as set forth.

5. In an insulating joint, the combination of two flanged sections, each flange having a portion cut away, in combination with sections or plugsof non-conducting materia1, extending from one section to the other and abutting against the sections -and extending into the depressions formed by cutting the section's away, said non-conducting material being of sufiicient tensile strength to resist the usual strain to which the couplings are" subjected tq prevent turning of the sections upon each other and a separate and independent clamp for holding the sections to-v gether, substantially as described. t 6. In an insulating joint, the combination 7 of two flanged sections, each flange having a port ion cut away; .in combination with se'ctions or plugs of non-conducting material,

extending from one section to the other and abutting againstthe sections and extending 3 into the depressions Jformed by cutting the sections away, said non-conducting material being of suflicient tensile strengthto resist the usual strain to which the couplings are subjected to prevent turning of the sections 46 upon each other and a separate and independent clamp embracing the flanges of the sections and insulated from them, substantia llyas described. a a 7. In an-insulating joint, the combination 45 ofitwo flanged sections, each flange having -a portion cut away; in combination with seations-or plugs-of I1QIi GOndllQfiing material,

extending from one section to the other and abutting againstthesections and ex'tending 5o subjectedto prevent turning of the sections 55 upon'each other and a separate and independent'clai'np. embracing the flanges of the sections and insulated fromthem and covering and protecting theplugs and theflanges of the sections, substantially as described. 66

- Signed at New York, in the county of New York and- State of New, York, this'29th dayof June, A.v D. 1894. nttior'rj P. GLEASO IL Witnesses V OLARENonR. FERGUSON, WM. L. BENNEM. 

